Northampton tree canopy change 2011-2021

Author

Kent Johnson

Introduction

This report uses data from the National Land Coverage Database (NLCD) to summarize tree canopy changes in Northampton, Mass. from 2001 to 2021.

NLCD data was obtained from the Multi-Resolution Land Characteristics Consortium. An interactive viewer for the underlying data is available here.

The NLCD provides data on tree canopy coverage at 30 meter resolution. The percent of canopy coverage is reported for each 30 meter square, with data available for each year from 2011 to 2021.

Tree canopy in Northampton

Overall tree canopy coverage in Northampton was approximately 57% for the entire period 2011-2021.

Canopy coverage increased slightly from 57.2% in 2011 to a high of 57.6% in 2013, then decreased to a low of 56.6% in 2021, a decline of just over 1%.

Canopy coverage declined by 0.6% from 2011 to 2021, a loss of 133 acres.

This chart shows tree canopy coverage for the City as whole.

This table shows the canopy percent and the change in percent and acres for the entire city.

Change in tree canopy coverage in Northampton, 2011-2021
Coverage
Total area
(acres)
2011 2021 Change
Acres Percent Acres Percent Percent Acres
Northampton 22,930 13,107 57.2% 12,974 56.6% −0.6% -133.0
Data: Multi-Resolution Land Characteristics Consortium | Analysis: Kent S Johnson

Tree canopy in city centers

This chart shows the tree canopy coverage within the three city centers of Northampton.

Leeds center has the greatest amount of coverage, over 40%. Florence center has about 35% coverage while Northampton is about 20%.

The map at the end of this report shows the extents of the three city centers.

The next chart shows the change in percent tree canopy coverage in city centers since the 2011 baseline.

Leeds is the only city center with increased canopy coverage from 2011 to 2021. Coverage has decreased by almost 2% in Northampton and Florence.

This table shows the canopy coverage in 2011 and 2021 in the three city centers and the change in percent and acres.

Change in tree canopy coverage in city centers, 2011-2021
Coverage
City center Total area
(acres)
2011 2021 Change
Acres Percent Acres Percent Percent Acres
Leeds 120 48.6 40.5% 50.1 41.8% 1.3% 1.5
Florence 149 53.0 35.5% 50.3 33.7% −1.8% -2.7
Northampton 138 29.1 21.2% 26.6 19.3% −1.8% -2.5
Data: Multi-Resolution Land Characteristics Consortium | Analysis: Kent S Johnson

Tree canopy by zoning category

This chart show the tree canopy percent within five zoning categories aggregated from the City zoning. Unsurprisingly, there is considerable difference in tree canopy coverage across the different zoning categories.

The next chart shows the change in percent tree canopy since the 2011 baseline, by zoning category.

The canopy increase from 2011 to 2013 is mostly in the Rural and Suburban/Water supply zones. All zones have seen a decrease in canopy since 2013. The decrease is largest in the Business/industrial and Central business zones.

This table shows the canopy coverage in 2011 and 2021 by zone.

Change in tree canopy coverage by zoning category, 2011-2021
Coverage
Zoning class Total area
(acres)
2011 2021 Change
Acres Percent Acres Percent Percent Acres
Suburban/Water supply 6,680 4,421 66.2% 4,379 65.5% −0.6% -42.9
Rural 13,019 7,544 57.9% 7,505 57.6% −0.3% -38.9
Urban 2,701 1,233 45.7% 1,201 44.4% −1.2% -32.7
Business/industrial 969 312 32.2% 296 30.5% −1.7% -16.3
Central business 258 36.0 14.0% 30.7 11.9% −2.0% -5.3
Data: Multi-Resolution Land Characteristics Consortium | Analysis: Kent S Johnson

Tree canopy by ward and precinct

This chart show the tree canopy percent within each voting ward and precinct.

The next chart shows the change in percent tree canopy since the 2011 baseline, by ward and precinct.

This table shows the canopy coverage in 2011 and 2021 by ward and precinct.

Change in tree canopy coverage by ward and precinct, 2011-2021
Coverage
Ward and precinct Total area
(acres)
2011 2021 Change
Acres Percent Acres Percent Percent Acres
6A 1,847 1,393 75.4% 1,384 74.9% −0.5% -8.9
7B 5,464 3,999 73.2% 3,971 72.7% −0.5% -27.8
6B 3,337 2,163 64.8% 2,178 65.3% 0.5% 15.2
7A 2,375 1,564 65.9% 1,510 63.6% −2.3% -53.6
1A 1,929 1,150 59.6% 1,125 58.3% −1.3% -24.8
5B 940 474 50.4% 468 49.8% −0.6% -5.9
5A 358 173 48.4% 170 47.6% −0.8% -2.9
4B 2,737 1,245 45.5% 1,239 45.3% −0.2% -5.1
2A 181 81.0 44.8% 77.0 42.6% −2.2% -4.0
1B 438 195 44.4% 186 42.4% −2.1% -9.0
2B 537 231 43.1% 220 41.0% −2.1% -11.3
3B 304 77.6 25.5% 71.6 23.6% −1.9% -5.9
4A 139 31.1 22.3% 28.6 20.5% −1.8% -2.5
3A 2,489 389 15.6% 400 16.1% 0.5% 11.3
Data: Multi-Resolution Land Characteristics Consortium | Analysis: Kent S Johnson

Canopy change map

This map shows the change in tree canopy percent from 2011 to 2021. Overlays show Northampton city centers, zoning categories as aggregated for this report, and wards and precincts.

Low canopy map

This map shows areas of the city with less than 20% tree canopy in 2021 in pink. Overlays show Northampton city centers, zoning categories as aggregated for this report, and wards and precincts.

Copyright 2024 Kent S Johnson Creative Commons License 2024-02-21